4.2 How Minerals Form

---

Vocabulary

---

Solution: A substance in which is dissolved by another substance
Vein: A part of a mineral that is sharp and different from the rest of the mineral

Outline

---

Process That Forms Minerals

• Minerals are formed inside deep of the Earth and can be formed in two different ways
  • One, through crystallization of melted material
    • Two, through crystallization of materials dissolved in water

Minerals From Magam

• Minerals form as hot lava that cools inside the crust
  • Size of crystals depend on several factors
    • Slow cooling leads to bigger crystal formation

Minerals From Hot Water Solutions

• First, water goes inside the crust dissolving the minerals
  • Second, the magma heating up the water
    • Third, water comes out and cools making crystals

Minerals formed by Evaporation

• Minerals can also be formed by evaporation
  • This is formed by salt water evaporating leaving salt crystals

Where Are Minerals Found

• Earth's crust is mainly made out of many crystals
  • 1800, are California's richest gold deposits